<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Feed.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Feed_Writer_Extension_RendererAbstract
 */
require_once 'Zend/Feed/Writer/Extension/RendererAbstract.php';

/**
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Writer_Extension_DublinCore_Renderer_Feed extends Zend_Feed_Writer_Extension_RendererAbstract {
	
	/**
	 * Set to TRUE if a rendering method actually renders something. This
	 * is used to prevent premature appending of a XML namespace declaration
	 * until an element which requires it is actually appended.
	 *
	 * @var bool
	 */
	protected $_called = false;
	
	/**
	 * Render feed
	 *
	 * @return void
	 */
	public function render() {
		if (strtolower ( $this->getType () ) == 'atom') {
			return;
		}
		$this->_setAuthors ( $this->_dom, $this->_base );
		if ($this->_called) {
			$this->_appendNamespaces ();
		}
	}
	
	/**
	 * Append namespaces to feed element
	 *
	 * @return void
	 */
	protected function _appendNamespaces() {
		$this->getRootElement ()->setAttribute ( 'xmlns:dc', 'http://purl.org/dc/elements/1.1/' );
	}
	
	/**
	 * Set feed authors
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setAuthors(DOMDocument $dom, DOMElement $root) {
		$authors = $this->getDataContainer ()->getAuthors ();
		if (! $authors || empty ( $authors )) {
			return;
		}
		foreach ( $authors as $data ) {
			$author = $this->_dom->createElement ( 'dc:creator' );
			if (array_key_exists ( 'name', $data )) {
				$text = $dom->createTextNode ( $data ['name'] );
				$author->appendChild ( $text );
				$root->appendChild ( $author );
			}
		}
		$this->_called = true;
	}
}
